Mori Seiki NVX5100 Spindle With Run Out



CHALLENGE

Reason for repair: Customer indicated that they experienced noise & poor finish, test bar rock with slow return. Bare shaft has 10-20µ runout with a 12'' test bar, and 10µ rock. Rear housing ID is oversized & egged +68/+90µ (ISO is 0/+15µ) Bearings in poor condition

SOLUTION

Repair action: Clean, inspect overall dimensions. Grind, chrome plate & finish grind the rear housing ID. Kiss grind tooling taper. Replace bearings, oil lines & ferrules, o-rings & assembly screws. Reuse Bellevilles, grippers & encoder sensor. Adjust preload, balance, assemble and break in. Final quality control inspection.

DETAILED CAUSE OF FAILURE

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